Arnaud, the incumbent starter, threw a pair of first-half interceptions, including one that linebacker Jesse Smith brought back 39 yards for a touchdown. Tiller, the backup, also tossed a first-half pick.

Arnaud finished 22-of-35 passing for 250 yards and a late TD pass in Saturday's scrimmage. Tiller was 14-of-24 passing for 210 yards with two touchdowns and one interception.

Tiller, who played mostly against the second-string defense, also ran for a 65-yard score.